# Solve question no. 1 of page no. 75 from the chapter "Average" of textbook "Shaping Maths AB 5B Part I - Solutions".

a)
1.25 + 3.5 + 15.35 + 11.6 = 31.7

 Press $\overline{)\mathrm{C}}$ 1.25 $\overline{)+}$ 3.5 $\overline{)+}$ 15.35 $\overline{)+}$ 11.6 $\overline{)=}$ Display: 31.7

The sum is 31.7 m.

b)
15.52 + 15.69 + 15.83 + 16.44 + 16.66 + 18.59 = 98.73

 Press $\overline{)\mathrm{C}}$ 15.52 $\overline{)+}$ 15.69 $\overline{)+}$ 15.83 $\overline{)+}$ 16.44 $\overline{)+}$ 16.66 $\overline{)+}$ 18.59 $\overline{)=}$ Display: 98.73

The sum is 98.73 s.

c)
158.75 $÷$ 5 = 31.75

 Press $\overline{)\mathrm{C}}$ 158.75 $\overline{)÷}$ 5 $\overline{)=}$ Display: 31.75

\$158.75 $÷$ 5 = \$31.75

d)
$7\frac{1}{4}$ + $9\frac{3}{5}$ + $6\frac{4}{5}$ + $8\frac{3}{4}$ = $30\frac{12}{5}$

 Press $\overline{)\mathrm{C}}$ $7\frac{1}{4}$ $\overline{)+}$ $9\frac{3}{5}$ $\overline{)+}$ $6\frac{4}{5}$ $\overline{)+}$ $8\frac{3}{4}$ $\overline{)=}$ Display: $30\frac{12}{5}$

e)
33.88 $÷$ 11 = 3.08

 Press $\overline{)\mathrm{C}}$ 33.88 $\overline{)÷}$ 11 $\overline{)=}$ Display: 3.08

f)
 $2\frac{3}{4}$ h = 2 h + $\frac{3}{4}$ h = 2 h + $\frac{3}{4}×60$ min = 2  h  45  min

• 0
What are you looking for?